Roller surface wear online welding, it takes 8~10 days;
Roller surface shedding is more common, and it is necessary to remove the roller for offline repair and surfacing, which is difficult to maintain.

The system equipment has few links, the failure rate is extremely low, and the operation rate is greater than 95%.

There are many links in the system equipment, the circulation volume is large, the load on the machine is large, and the risk of failure is large, and the operation rate is about 90%.